What is another word for ballpoint pen?
Pronunciation: [bˈɔːlpɔ͡ɪnt pˈɛn] (IPA) 
A ballpoint pen, also known as a biro or ballpoint, is a writing instrument that uses a small ball to dispense ink as it moves across paper. Other synonyms for ballpoint pen include a ballpen, ball pen or just pen. Other variations include rollerball pen, gel pen, and fountain pen. While all these pens use a ball or nib to write, they differ in ink consistency, flow, and refillability. Rollerball pens use water-based ink, which flows more smoothly than oil-based ink used in ballpoint pens. Gel pens offer a thicker, more fluid ink, while fountain pens use a nib and ink that must be refilled with a cartridge or converter.
